硅光电二极管探测器在低能X射线辐射场上的标定  

Calibration of Silicon Photodiode Detector on Low Energy X-ray Radiation Fields

作　　者：黄林茹 姚馨博 王继 陈灿[2] 孙坚[1] 郭思明[3] 郭晓炜 张小改 徐红伟[1] HUANG Lin-ru;YAO Xin-bo;WANG Ji;CHEN Can;SUN Jian;GUO Si-ming;GUO Xiao-wei;ZHANG Xiao-gai;XU Hong-wei(China Jiliang University,Hangzhou,Zhejiang 310018,China;Zhejiang Province Institution of Metrology,Hangzhou,Zhejiang 310018,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]中国计量大学,浙江杭州310018 [2]浙江省计量科学研究院,浙江杭州310018 [3]中国计量科学研究院,北京100029

出　　处：《计量学报》2021年第6期806-810,共5页Acta Metrologica Sinica

基　　金：国家重点研发计划(2017YFF0205102)。

摘　　要：在同步辐射X射线能量标定前,需要对作为传递探测器的硅光电二极管进行标定。利用低能X射线10~50 kV空气比释动能基准装置,研究硅光电二极管的辐射响应并用它测量辐射场的均匀野大小。将硅光电二级管AXUV-100G置于低能X射线基准辐射场中,测得AXUV-100G作为传递探测器在10~40 keV能量范围的能量响应较高,在各个辐射质条件下复现空气比释动能的不确定度均为0.57%。AXUV-100G在距离光机焦斑1 m处测量得到均匀性优于99%的辐射野直径约为61 mm,优于95%时约为96 mm,满足次级传递标准量值复现与传递的要求。Before calibrating synchrotron radiation X-ray energy,the silicon photodiode as a transfer detector needs to be calibrated. Using a low energy from 10 kV to 50 kV X-ray air kerma reference device to study the radiation response of silicon photodiodes,then use it to measure uniform radiation field range. As a transmission detector,the AXUV-100 G has a high energy response in the energy range from 10 keV to 40 keV placing in the low energy X-ray reference radiation field. The uncertainty of reproducing air kerma is 0. 57 % in all radiative conditions. The diameter of visual field with an uniformity better than 99 % of AXUV-100 G at a distance of 1 m from the focal spot of the X-ray machine is about 61 mm,and better than 95 % is 96 mm,which meets the requirements of secondary transmission standard value reproduction and transmission.

关 键 词：计量学 低能X射线 硅光电二极管 均匀野 刻度因子 

分 类 号：TB98[一般工业技术—计量学]